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- 1Subset of a Set - LearnAlberta.ca
The symbol "⊂" means "is a proper subset of". Example. Subset example. Since all of the members o...
- 2子集- 維基百科，自由的百科全書 - Wikipedia
也是一個很常見的符號，但其含義容易混淆。 有人用 ⊂ {\displaystyle \subset } \subset 和 ...
- 3The difference between ∈ and ⊂ - Mathematics Stack ...
- 4这两个符号⊂ 和⊃是什么意思？与⊆ ⊇有什么区别？ - 知乎
⊆ ⫋ ⊊ ⊄ ⊂分别是什么意思？有地方说真包含是⫋，有的说是 ...
- 5Subset - Wikipedia
In mathematics, a set A is a subset of a set B if all elements of A are also elements of B; B is ...
